No, because she isnt really ready to be a winx. She is going to Alfea.(when she was 19) and her civilian outfit didn't seem to change in the trailer. And in the season5 trailer, in the beginning she wasn't with them, if she was a winx she would stand there listening to her "faith" with the winx. But she didn't. She was only in one scene of season 5. And I don't think they clarified she even was a winx
I'm still hopeing so.Well we have see her in one scene of the trailer.She isen't in harmonix and sirenix but.their is a photo named pescix they are like pixies and i read on a winxnews blog that in all the ocean the are seven pescix and the winx must have one all of them.Why in the world did they made seven not six.think a little.Maybe the creators want to make a surpise .so they don't put roxy in transformtion or trailer so we can think she isen't one.and in season 5 we will see that she is a winx.I don't know if she is but i hope so.